Cut the spam into small cubes.
Finely chop the onion.
Heat oil in a pan and stir-fry the spam.
When the spam turns golden, add the onion and stir-fry together.
Prepare rice and place it in a bowl.
Top the rice with the stir-fried spam and onion.
Drizzle an appropriate amount of mayonnaise.
Finish by sprinkling seaweed flakes on top.